Question

A car of mass 1200 kg travelling with speed of 60 km/h on a straight road is ahead of a scooter

travelling with speed of 60 km/h, then what will the speed of centre of mass of these vehicles ?

(A) 60 km/h (B) 72 km/h (C) 75 km/h (D) 68 km/h​

Answer 1

Answer:

Hi friend ,

here is your answer

80 meters

Answer 2

Answer:

The correct answer is option (A) 60 Km/h.

Explanation:

m1 is the mass of the car.

m2 is the mass of the scooter.

v1 is the speed of the car.

v2 is the speed of the scooter.

$m{1} = 1200 \: kg$

$m2 = 80 \: kg$

$v1 = 60 \: \frac{km}{h}$

$v2 = \frac{km}{h}$

The formula to calculate the speed of centre if mass of these vehicles is given by,

$v = \frac{m1v1 + m2v2}{m1 + m2}$

$v = \frac{(1200 \times 60) + (80 \times 60)}{1200 + 80}$

$v = \frac{76800}{1280}$

$v = 60 \frac{km}{h}$

#SPJ3